Anode material for sodium ion battery, and sodium ion battery

A sodium-ion battery and negative electrode material technology, which is applied in the direction of battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems such as the decrease of initial charge and discharge efficiency, and achieve the effect of improving the initial charge and discharge efficiency

Pending Publication Date: 2021-05-11
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the non-aqueous electrolyte is reduced and decomposed, there is a problem that the initial charge and discharge efficiency decreases

Method used

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  • Anode material for sodium ion battery, and sodium ion battery
  • Anode material for sodium ion battery, and sodium ion battery
  • Anode material for sodium ion battery, and sodium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] (Synthesis of NaCBH compound)

[0092] NaCB dried overnight at 160°C under vacuum 9 h 10 (manufactured by Katchem Corporation) and NaCB 11 h 12 (manufactured by Katchem Co.) Weigh them in a molar ratio of 7:3, put them in 45 mL of ZrO 2 bottle, and then to ZrO 2 Put 20 pieces of φ5mm Zr into the bottle 2 O balls, mixed at 500 rpm for 20 hours. Thus, a NaCBH compound was obtained.

[0093] (Synthesis of glassy carbon materials)

[0094] 8 mL of 0.01M hydrochloric acid (manufactured by Kishida Chemical Co., Ltd.), 1.2 mL of absolute ethanol (manufactured by Kishida Chemical Co., Ltd.), 4.4 g of resorcinol (manufactured by Sigma-Aldrich Co., Ltd.), and 6 mL of formaldehyde (manufactured by Sigma-Aldrich Co., Ltd. ) were mixed at 0°C, left to stand at 40°C for 24 hours, and dried at 80°C for 24 hours. Then, the operation of adding 60° C. ethanol to the mixture and leaving it still for 4 hours to wash it was repeated three times, and dried at 60° C. overnight. Next...

Embodiment 2

[0100] A sodium-ion battery was produced in the same manner as in Example 1 except that CARBOTRON P (manufactured by Kureha) was used as the glassy carbon material, and a charge-discharge test was performed.

Embodiment 3

[0102] KURARAY COAL YP (manufactured by Kuraray) was fired in an Ar atmosphere at 2000°C for 2 hours to obtain a glassy carbon material, and a sodium-ion battery was produced in the same manner as in Example 1, and a charge-discharge test was performed. .

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Abstract

The invention provides an anode material that can improve the efficiency of the initial charging and discharging and a sodium ion battery, the anode material includes an amorphous glassy carbon material that is an anode active material, and a NaMH compound that is a solid electrolyte.

Description

technical field [0001] The present application relates to negative electrode materials for sodium ion batteries and sodium ion batteries. Background technique [0002] Lithium-ion secondary batteries take advantage of their high capacity and light weight, and are used as power sources for mobile devices and vehicles. However, there are concerns about the high price of raw materials for lithium. Therefore, a sodium ion battery using sodium, which is abundant in resources, has attracted attention as a material to replace lithium. [0003] Non-Patent Document 1 discloses a sodium secondary battery using hard carbon as a negative electrode active material and a non-aqueous electrolytic solution in which a sodium salt is dissolved in a carbonate solvent as an electrolyte. In addition, Patent Document 1 discloses a sodium ion secondary battery using a porous carbon material as a negative electrode active material. [0004] prior art literature [0005] Patent Document 1: Inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/587H01M10/0562H01M10/054
CPCH01M4/587H01M10/054H01M10/0562H01M2004/027H01M2004/021H01M2300/0088H01M4/62H01M4/133H01M2300/0065Y02E60/10H01M2300/0068H01M50/431
Inventor 二井谷启太后田伸桑田纮子穗积正人
Owner TOYOTA JIDOSHA KK
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